phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('59fe8fb380db92c7923c57834a6693a4', -1, 1722038127, 1722038127, '03911203', -4, 0, 0)

Line : 172
File : /home/rebkell/public_html/boards/includes/sessions.php